Deuteros: The Next Millennium is the sequel to the sci-fi strategy video game Millennium 2.2, published by Activision for the Amiga and Atari ST. Ian Bird designed and wrote the game, with graphics by Jai Redman and music by Matt Bates.

The game is set some 800 years after Millennium, in a time when mankind has won the struggle to make the Earth habitable again but lost its spacefaring capabilities, which it is seeking to regain.

Initially the player has Earth resources with which he can build ships and orbital factories. The first factory will give the player the technology to make IOSs (interplanetary operations spacecraft) with which he can build orbital factories over selected planets and moons of the solar system. First the player can use the IOS to extract material from asteroids not found on Earth (such as silver, platinum, etc.), and later build bases on the selected planets with the orbital factories so that exotic material is steadily produced.